      body {
            font-family: Arial, sans-serif;
            background-color: #f4f4f4;
        }
        .container {
            max-width: 500px;
            margin: 20px auto;
            padding: 20px;
            background-color: #fff;
            border-radius: 5px;
            box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
        }
        h1 {
            text-align: center;
            margin-bottom: 20px;
        }
        form {
            margin-top: 20px;
        }
        label {
            font-weight: bold;
        }
        input[type="text"],
        input[type="number"] {
            width: 100%;
            padding: 10px;
            border: 1px solid #ccc;
            border-radius: 5px;
            box-sizing: border-box;
        }
        .btn-group {
            text-align: center;
            margin-top: 20px;
        }
        .btn {
            padding: 10px 20px;
            border: none;
            border-radius: 5px;
            cursor: pointer;
            transition: background-color 0.3s;
        }
        .btn-primary {
            background-color: #007bff;
            color: #fff;
        }
        .btn-primary:hover {
            background-color: #0056b3;
        }
        .btn-secondary {
            background-color: #6c757d;
            color: #fff;
        }
        .btn-secondary:hover {
            background-color: #555;
        }